Nissan Leaf. Manual - part 1170

TM-86

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P1897 ENCODER ERROR

P1897 ENCODER ERROR

DTC Logic

INFOID:0000000010119595

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, power switch OFF and wait for at least

10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Set the vehicle to READY.

2. Shift the selector lever to N position and wait for 10 seconds or more.

3. Press the P position switch to shift to P position and wait for 10 seconds or more.

4. Check DTC.
Is “P1897” detected? 

YES

>> Go to 

TM-86, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010119596

1.

CHECK ENCODER POWER SUPPLY CIRCUIT

1. Power switch OFF.

2. Disconnect the parking actuator connector.

3. Check the voltage between parking actuator vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK HARNESS BETWEEN VCM AND ENCODER

1. Power switch OFF.

2. Disconnect the VCM connector.

3. Check the continuity between VCM vehicle side harness connector terminals and parking actuator vehicle

side harness connector terminals.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P1897

ENCODER ERROR
(Encoder Error)

Encoder signals are not transmitted despite the ac-
tuation of parking actuator by the electric shift control 
module.

• Encoder (Parking actuator)
• Harness or connectors

(Each circuit is open or shorted.)

Parking actuator

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

F4

9

Ground

Power switch ON

5 V

VCM

Parking actuator

Continuity

Connector

Terminal

Connector

Terminal

E61

44

F4

3

Existed

45

5

56

8

P1897 ENCODER ERROR

TM-87

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

4. Check the continuity between VCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-53, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace the reduction gear due to malfunction in the encoder (parking actuator). Refer to 

TM-21,

"Removal and Installation"

.

NO

>> Repair or replace damaged parts.

4.

CHECK HARNESS BETWEEN VCM AND ENCODER

1. Power switch OFF.

2. Disconnect the VCM connector.

3. Check the continuity between VCM vehicle side harness connector terminal and parking actuator vehicle

side harness connector terminal.

4. Check the continuity between VCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> Replace the VCM due to malfunction in the electric shift control module built in VCM. Refer to

EVC-423, "Removal and Installation"

.

NO

>> Repair or replace damaged parts.

VCM

Ground

Continuity

Connector

Terminal

E61

44

Ground

Not existed

45

56

VCM

Parking actuator

Continuity

Connector

Terminal

Connector

Terminal

E61

32

F4

9

Existed

VCM

Ground

Continuity

Connector

Terminal

E61

32

Ground

Not existed

TM-88

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P1899 MOTOR A

P1899 MOTOR A

DTC Logic

INFOID:0000000010119597

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, power switch OFF and wait for at least

10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Power switch ON and wait for 2 seconds or more.

2. Check DTC.
Is “P1899” detected? 

YES

>> Go to 

TM-88, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010119598

1.

CHECK HARNESS BETWEEN VCM AND MOTOR COIL A

1. Power switch OFF.

2. Disconnect the VCM connector.

3. Disconnect the parking actuator connector.

4. Check the voltage VCM vehicle side harness connector terminals and ground.

5. Check the continuity VCM vehicle side harness connector terminals and parking actuator vehicle side har-

ness connector terminals.

Is the inspection result normal?

YES 

>> GO TO 2.

NO

>> Repaire or replace damaged parts.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P1899

MOTOR A
(Motor “A” Circuit High)

When the power switch is ON, either of two ener-
gized phases is in the non-energized state.
NOTE:
Energized: Approx. 0 V, Non-energized: 9 – 16 V

• Electric shift control module
• Motor coil A (Parking actuator)
• Harness (12V battery short)

VCM

Ground

Voltage

(Approx.)

Connector

Terminal

E61

1

Ground

0 V

13

39

VCM

Parking actuator

Continuity

Connector

Terminal

Connector

Terminal

E61

1

F4

1

Existed

13

6

39

7

P1899 MOTOR A

TM-89

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

2.

CHECK MOTOR COIL A

Check the motor coil A. Refer to 

TM-89, "Component Inspection (Motor Coil A)"

.

Is the inspection result normal?

YES >> INSPECTION 

END

NO

>> Replace the reduction gear due to malfunction in the motor coil A (parking actuator). Refer to 

TM-

21, "Removal and Installation"

.

Component Inspection (Motor Coil A)

INFOID:0000000010119599

1.

CHECK MOTOR COIL A

1. Disconnect the parking actuator connector.

2. Check the resistance between parking actuator connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the reduction gear due to malfunction in the motor coil A (parking actuator). Refer to 

TM-

21, "Removal and Installation"

.

Parking actuator connector

Resistance

Terminal

2

1

2.3 – 2.8 

Ω

6

7